Station-selector dial for radio receiving sets



umsssuv April 10, 1928.

M. NYSTROM STATION. snmacron DIAL FOR RADIO nncmvme sm's Filed July 25, 1925 2 Sheds-Sheet 1 April 10, 1928. LGSSfiM M. NYSTROM STATION SELECTOR DIAL FOR RADIO RECEIVING-SETS Filed July 25, 1925 2 Sheets-Sheet 2 Z y 9 6 95 24- W Patented Apr. 10, 1928.

UNITED STATES 1,665,891 PATENT OFFICE.

BAR-TIN NYSTEOM, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE BRUNSWICK-RALEI- COLLENDEB COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

STATION-SELECTOR DIAL FOR RADIO RECEIVING SETS.

Application filed July 25, 1925. Serial No. 46,043.

This invention relates to station selector dials for radio receiving sets, and its object is to provide a simple and convenient means for maintaining a record of broadcasting stations and for dialin to select different stations, as desired, within a fine degree of adjustment of the receiving set.

A further object of the invention is to provide the dials in the form of endless 10 bands, which are capable of being easily manipulated, and which enable the record of stations to be maintained for more convenient reference than is possible with disk dials.

The invention has other objects in view which will appear hereinafter in the detail description in connection with the accomanying drawings, showing a selected em- Eodiment, and referring to which Fig. 1 is a plan view of the invention with a portion of the instrument board to which it is applied.

Fig. 2 shows the invention with the face plate and one dial band removed.

25 F ig. 3 is a sectional view on the line 3-3 of Fig. 1.

' Fig. 4 is a sectional view on the line 44 of Fig. 1.

Fig. 5 is a sectional view on the line 5-5 80 of Fig. 3.

Fig. 6 is a bottom plan view of the parts, as shown in Fig. 2.

Referring to the drawings, 7 is the instrument board of a radio receiving set and 5 8 is a face plate fastened thereto by screws 9 and provided with o nings 10 to disclose the dial bands 11 an openings 12 to disclose the circular knobs 13 for moving the bands back and forth as desired. Each of 40 these bands is carried by a drum 14 and by a ratchet drum 15, the latter having ratchet teeth 15' thereon engaging openings 16 in the band to register the band in a predetermined position on the drums, and also to 45 move the hand back and forth as the knobs 13 are manipulated. These knobs are preferably knurled or serrated and they are mounted on shafts 17 which carry the ratchet drums 15 and gears 18 meshing with gears 50 19 on the rotor shafts 20, which carry the rotor plates of the loop tuning and oscillator tuning condensers 21. a

Each of the shafts 17 and ratchet drums 15 is mounted in a frame 22 which is piv- 55 oted to swing in ears 23 depending from the 25 interposed between the frame 22 and the plate 24 normally presses the frame 22 downward to hold the gear 18 in meshing engagement with the gear 19. Each of the drums 1 1 is revolubly mounted in a frame 26, which is slotted at 27, 27, (Fig. 4) and engaged with the studs 28, 28 on the supporting plate, whereby the frame 26 is capable of sliding longitudinally of said plate. A. spring 29 engaged with the rear end 30 of the name 26 and with the stud 28' normally holds the frame in forward position to maintain the dial band 11 at tension.

The supporting plate 24: has openings 31, 32 to receive the hooks 33, 34 on the face plate 8 whereby the supporting plate and face plate are engaged to suspend the supporting plate from the face plate in operative position of the device (Fig. 4). A double arrow 35 on' the face plate between the openings 10, 10 is a guide whereby the two dial bands may be registered to select a previously determined station. One of the gears 19 is provided with a slot 36 to receive a stud 37 on the other gear 19 to permit these gears and the dial bands a limited relative movement to facilitate selecting a station.

By manipulating the knobs 13 the rotor plates of the condensers are adusted totune in a station and then the call letters should be written in the spaces on the bands op 0- site the double arrow 35. Thus the call etters for all the stations within the range of the receiving set may in time be recorded on the band. The spaces marked on the bands for the call letters may be of any desired size; they may be small to' receive only a sin le station call or they may be lar e enoug to receive more than one station ca 1. When it is desired to replace the bands with new bands, the device is removed from the instrument board and the face late is disengaged from the su porting ate, so that access may be readily ad to the bands. Then the drum 14 is retracted against the tension of its spring to free the band from the teeth 15 on the drum 15. The sliding frame 26 permits the removal of the old bands from the drums and enables the new bands to be placed on the drums easily and quickly; after which the supporting plate and face plate may again be engaged and the device replaced in the instrument board. My inmade without de arting from the spirit or sacrificing the vantages of the invention, and I reserve the ri ht to make all such changes as fairly fal within the scope of the following claims.

- Iclaim:

1. Station selector means for radio receiving sets oomprisin a support, a tuning element, a rotor sha t for the tuning element, a frame ivotall connected to said su port, another rame slidabl mounted on said support, a drum revolub y mounted in each of said frames, means 0 eratively connecting one of the drums wit said rotor shaft, a

dial band'mounted on the drums, and meansfor operating one of the drums to adjust the dial band and the rotor shaft for selecting a station. a

2. Station selector means for radio receiving sets comprising a pair of rotatable drums, a su port therefor, one of said drums being movable relatively to the other drum,

a tuning element, a rotor shaft for the tuning element, means operatively connecting one of the drums with said rotor shaft a dial band mounted on the drums, a slidingly mounted frame for one of said drums an a pivotally mounted frame for the other drum, and means for operating one of thedrums to adjust the dial band and the rotor shaft for selecting a station and a cooperating rotor shaft with means for relative movement of said shafts.

3. Station selector means drums, a support therefor, one of said drums I being slidable relatively to the other drum,

a tuning element, a rotor shaft for the tuning element, means 0 cratively connecting one of the drums wit tion, a second dial-band adjacent sai other dial band and operated in the samemanner, and means forv allowing limited relative i movement of the dial bands to facilitate selooting a station.

4. tation selector means for radio receiving sets comprising a pair of rotatable drums, a support therefor, one of said drums being movable towards and from said support, a tuning element, a rotor shaft for the tuning element, means operatively connecting one of the drums with said rotor for radio receiving sets comprising a pair of rotatablesaid rotor shaft, a fdial band mounted on the drums means for operatin one of the drums to ad ustthe dialv band an the rotor shaft for selectin a sta-' egan Y shaft, a dial band mounted on the drums, and means for operating one of the drums to adjust the dial band and the rotor shaft for selecting a station, a cooperating dial band adjacent said first named dial band and similarly operated, and means for permitting relative movement of said bands.

5. Station selector means for radio receiving sets comprising a pair of rotatable drums, a support therefor, said drums being movable bodily in different directions relative to each other, a tuning element, a rotor shaft for the tuning element, means positively operatively connecting one of the drums with said rotor shaft, a dial band ing sets comprising a pair of rotatable drums, a su port therefor, one of said drums being slida e and the other drum being pivotal and yieldable relative to said support, a tuning element, a rotor shaft for the tuning element, means operatively connecting one of the drums with said rotor shaft a dial band mounted on the drums, and means for operating one of the drums to adjust the dial band and the rotor shaft for selecting a station. 7 Station selector. means -'for radio re ceiving sets comprising a drum, means for rotating said drum, a dial band engaged with said drum, a tuning element, a rotor shaft for the tuning element, caring intermediate of the drum'and the rotor shaft for producing cooperative movement in selectmg a station, pivotal means for so portin the drum, means for supporting sai pivota "drum, a tuning element, a rotor shaft for the tuning element, a gear on the rotor shaft, a

gear on the shaft of and operating with the rum and engaging the gear on the rotor shaft, sup ortmg means, and a frame pivoted to sea su porting means and carrying said drum an its gear.

9. Station selector meansfor radio receiving sets oomprisin a drum, means to rotate said drum, a dizfi band engaged with said drum, a tuning element, a rotor shaft for the tuning element, a gear on the rotor shaft, a gear operating with thedrum and engaging the gear on the rotor shaft, a pivoted frame carrying said drum and its gear, a support for the frame, and yielding means, and means connected to said pivotal I means interposed between said support and the frame for holding said gears in meshing engagement.

10. Station selector means for radio receiving sets comprising, in combination a pair of rotatable drums, a dial band engaging said drums, a support, a frame for carrying the drums and slidably enga ed with the support, yielding means for ho ding said frame in an adjusted position, a rotor shaft, a tuning element operated by said shaft, and a gear on one of said drums to operate said shaft for selecting a station.

11. Station selector means for radio receiving sets comprising a pair of rotatable drums, a support therefor, a tuning element, a rotor shaft for the tuning element, a gear on one of said drums, another gear on said shaft, yielding means for holding the gear on one of the drums in meshlng engagement with the gear on said rotor shaft, a dial band on the drums, yielding means for maintaining said band at tension, and means for operatin one of the drums to adjust the dial band and the rotor shaft for selecting a station.

12. Station selector means for radio receiving sets comprising two pairs of rotatable drums, a support therefor, two tuning elements, rotor shafts for said tuning elements, gears on said shafts, means operatively connecting one of each pair of drums with one of the rotor shafts, dial bands mounted on the drums, means for limiting the movement of said gears relative to each other, and means for operating one of the drums of each air to adjust the dial bands and the rotor s afts for selecting a station.

13. Station selector means for radio receivin ceiving sets comprising a support, rotatable drums mounted on said su port, dial bands mounted on said drums, kno s connected with two of said drums-for dialing the bands, tuning elements, rotor shafts for said tuning elements, means connecting two of the drums with said rotor shafts, means providing a limited loose connection between the rotor shafts, and a face plate engaged with said support and having openings for said bands and knobs. I

15. Station selector means for radio re-- ceiving setscomprising a plate, a rotatable drum pivotally connected to said late, a tuning element, a rotor shaft for sai tunln element, means operatively connectin sai drum with said rotor shaft, a frame shdably mounted on said plate, a second rotatable drum mounted on said frame, a dial band connecting said drums, and means connected to said frame to maintain said dial band at a tension.

MARTIN NYSTROM. 

